Ice-cream freezer



(No Model.)

J. MARSDEN. Ice Cream Freezer.

Patented May 31,1881.

l H 4 0 E a I e w m e e 1 wnnesns: I 7 I INVENTOR: WJQMZQ N 4 a k I BY Q 4 ATTORNEYS.

ETED STATES ATEN'T OFFICE.

JOHN MARSDEN, ()F OHESTEE, PENNSYLVANIA.

ICE-CREAM FREEZER.

SPECIFICATION forming part of Letters Patent No. 242,345, dated May 31, 1881.

Application filed October 8, 1880. (Model) To all whom it may concern:

Be it known that I, JOHN MAR SDEN, of Ghester, in the county of Delaware and State of Pennsylvania, have invented a new and useful Improvement in Ice-Cream Freezers, of

which the following is a specification.

Figure 1 is a sectional front elevation of the improvement, taken through the line 00 a", Fig. 2. Fig. 2 is a side elevation. Fig. 3 is a sectional elevation of the lower part of the freezer, taken at right angles with the section shown in Fig. 1. Fig. 4 is a plan view of the stationarytable-support.

Similar letters of reference indicate corresponding parts.

The object of this invention is to furnish icecream freezers so constructed that they will make smoother cream than the ordinary freezers, and will make a greater quantity of cream from the same quantity of material.

A represents a floor or bench upon which the freezer stands, and to which is attached the lower end of a standard, B. The upper end of the standard B has arms 0 formed upon it, which are curved or inclined outward and upward, as shown in Fig. 1. In bearings in the upper end of the standard B revolves a short shaft, D.

To the outer end of the shaft D is attached acrank-whee1,E, by means of which the freezer is worked, and which is made heavy, to serve as a fly-wheel and give steadiness and momentum to the movements of the-operatin g mechanism.

To the forward end of the shaft D is attached a small crank-wheel, F, to the crankpin of which is pivoted the inner end'of the connecting-bar G. The outer end of the connecting-bar Gr is pivoted by a bolt, H, to the arm I formed upon the bent lever J at its angle. The arm I is slotted longitudinally to receive the bolt H, so that the said bolt H can be adjusted to regulate the throw of the lever J as the size of the freezer may require, as will be hereinafter described. The lever J is is pivoted at its angle to the end of one of the arms G, and to the end of its short arm is pivoted the end of a connecting-bar, K. The other end of the connecting-bar K is pivoted to the end of the short arm of a bent lever, L, which is pivoted at its angle to the end of the other arm, 0. The lever L is exactly like the lever J, except that it has no arm I.

To the end of the long arm of each of the levers J L is attached a bolt, M, to receive a socket, N, formed upon the lower side of the inner end of the arm 0.

To the upper sides of the inner ends of the arms 0 are attached the inner ends of spiral springs P, the outer ends of which are attached to the short arms of the levers J L at a little distance from the an gles ofthe said levers. The v forward ends of the arms 0 are forked or split, and the prongs or clips 0 thus formed aremade sufficiently elastic to allow thehandles or shafts of the scrapers Q to be pressed into the said clips, and at the same ti mearem ade sufficiently strong to hold the said scrapers firmly. One of the arms 0 is made longer than the other, so that the scrapers Q will cross each other without interfering with each others movements. The scrapers Q are held against the opposite sides of the interior of the can or cream-receptacle R of the freezer with a yielding pressure.

With this construction, as the crank-wheels E F are revolved, the connecting-bar G and slotted arm I work the bent lever J upon its pivot and cause the end of its long arm to move up and down through the arc of a circle. At the same time the connecting-bar K causes the movement of the lever J to work the lever L and cause the end of its long arm to move up and down through the are of a circle, the two levers J L always moving in opposite directions. As the ends of the long arms of the levers J L move up and down the elasticity of the springs P, acting upon the rocking arms 0, holds the lower ends of the scrapers Q against the sides of the can It, so as to scrape the cream from the sides of the said can B. At the same time the movements of the arms of the levers J L carry the upper ends of the scrapers Q through the arcs of circles, the effect of which movement, in connection with the rocking movements of the socket-arms N 0 upon their pivots M, is to cause the scrapers to move down nearly vertically through the upper part of the can It, and as the scrapers Q pass through the lower part of the said can the upper parts of the said scrapers are car-- ried quickly inward, pressing the cream from support U.

the sides toward the middle of the said can, which inward movement of the scrapers, as'it forces the cream back, renders it smooth and light. As the scrapers Q move upward these movements are reversed. l Vith this construction, the scrapers Q being held against the inner surface of the cream-vessel with a yielding pressure, the said scrapers can adjust themselves to any irregularities in the inner surface of the sides of the'cream-vessel, and to different-sized vessels. The can R is placed in a tub, S, or receiver for the ice and salt or other freezing mixture in the ordinary manner. The tub S stands upon a table, T, made in the form of an inverted cylindrical cup, the edges of which rest upon the edges of a similar cylindrical cup, U, which forms a support for the said table T. The support U is stationary, but the table T is revolved slowly upon its support U, and is kept in place upon it by a pivot, V, attached to the center of the table T, and which enters a socket, \V, in the center of the The pivot V also serves as a fulcrum to the lever X, which has a hole formed through it near its inner end to receive the said pivot V.

To the end of the short arm of the lever X is attached the end of a coiled spring, Y, the other end of which is attached to the end of the inner arm of a bent lever-pawl, Z. The lever-pawl Z is pivoted at its angle to the long arm of the leverX, at a little distance from the pivot V, and in such a position that the outer end of the said pawl Z will rest against the in nor surface of the sides of the table T, so that the said table T will be slowly revolved by the vibration of the lever X. The long arm of the lever X passes out through a slot in the upper edge of the support U, and projects in the direction of the standard 13. The outer end of the lever X is slotted or forked to receive the lower end of the lever a, so that the lever X will be vibrated to operate the pawl Z and re volve the table T by the vibration of the said leyer a. The lever (t is pivoted at a point a I little below its center to the standard B. The upper end of the lever a is widened, and is slotted to receive the eccentric I), attached to the shaft D, or to the rear side of the crankwheel F, so that the lever a will be vibrated to rotate the freezer-can It by the movement of the mechanism that operates the paddles Q.

Having thus described my invention, I claim as new and desire to secure by Letters Iatent l. The drive-shaft D, connected with the scrapers by the small wheel 1* having crankpin, the pivoted bar G, the lever J, having slotted arm I, the bar K, the bent lever L, the socketed arm 0, having elastic prongs c, and the springs l, as and for the purpose specified.

2. The combination, with the tub S, of the cups T U, the former revolving upon the lat ter an d centered thereto by the pivot and socket V \V, as and for the purpose set forth.

3. The combination, with the table T and pivot V, of the lever X, coiled spring Y, pawl Z, lever a, and the eccentric b on the driveshaft, as and for the purpose described.

4. In an ice-cream freezer, the combination, with the vertieallymoving scrapers Q, and the vibrating levers J L, of the rocking arms 0 and the springs P, substantially as herein shown and described, whereby the scrapers are held with a yielding pressure against the inner surface of the freezingvessel during their upand-down movement, as set forth.

5. In an ice-cream freezer, the combination, with the vertically-moving scrapers Q, of a mechanism by which the scrapers will be held against the inner surface of the cream-vessel with a yielding pressure, substantially as herein shown and described, whereby the scrapers can adapt themselves to any irregularities in the inner surface of the vessel and to vessels of different sizes, as set forth.

JOHN MARSDEN.

Witnesses:

EDMUND BURKE, SAMUEL J. ROSE. 

